I.S. DESCRIPTIVE SYSTEMS DOCUMENT
INTRINSIC DEVICE CHECK CALCULATOR

Enter parameter values from associated "EC Type Examination Certificates".

Uo: (volts)

Ui: (volts) PLEASE ENTER VOLTAGE (V) PARAMETER VALUES


Io: (mA)

Ii: (mA) PLEASE ENTER CURRENT (mA) PARAMETER VALUES


Po: (mW)

Pi: (mW) PLEASE ENTER POWER (mW) PARAMETER VALUES


Lo: (mH)

Li: (mH)

Lcc: (cable mH/meter)

Ml: (meters) PLEASE ENTER INDUCTANCE PARAMETER VALUES


Co: (microJ)

Ci: (microJ)

Ccc: (cable microJ/meter)

Mc: (meters) PLEASE ENTER CAPACITANCE PARAMETER VALUES


NOTE 1:
The voltage (Uo), current (Io), power (Po), inductance (Lo) and capacitance (Co) output parameters of the source of power should be compared with the input parameters (Ui, Ii, Pi, Li and Ci) of the field device and of the interconnecting cable parameter values of Lc(Lcc & Ml) and Cc(Ccc & Mc).

NOTE 2:
Safe Area Apparatus (i.e. Barrier):

  1. Uo
  2. Io
  3. Po
  4. Lo
  5. Co

NOTE 3:
Field Apparatus (i.e. Transmitter):

  1. Ui
  2. Ii
  3. Pi
  4. Li
  5. Ci

NOTE 4:
Cable parameters (i.e. BS5308 Part 1, Type 2):

  1. Lcc
  2. Ccc
  3. Mc & Ml (cable length)

NOTE 5:
I.S. Calculator is based on the requirements of:

  • ET105:2011
  • I.S. EN60079-25

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